How do I install and use this?<br />

To install the mod manager itself, unzip all of the files in the archive and move them into the folder in which FTLGame.exe resides.<br />

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Mods come in .ftl files. To make one available to GMM, simply drag it into the /mods folder.<br />

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To install mods, open GMM, select the mods you want to be installed, and hit OK. Please note that you need to re-select mods that you already have installed, otherwise they will uninstall themselves.<br />

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In order to completely uninstall all mods, simply start the patching process with nothing selected.<br />

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Help! It's giving me an error.<br />

Try deleting modorder.txt from your /mods folder and relaunching GMM. If that doesn't work, try asking on this thread.